Wave properties such as interference are demonstrated with a tabletop wave tank, displayed using an overhead projector.
Wave properties are universal to all waves. Observing diffraction and interference in water waves can help students understand these phenomena in light and sound waves.
NCEA & Science Curriculum
SCI 1.3, PHYS 1.4, PHYS 2.3, PHYS 3.3
Careful lighting is the key. Video does not work very well, it is better to see this demo live. We have various accessories.
Individual teachers are responsible for safety in their own classes. Even familiar demonstrations should be practised and safety-checked by individual teachers before they are used in a classroom.
Would you like to contribute lesson suggestions? Contact us.
This teaching resource was developed with support from